Line radiation events induced by very low frequency transmitters observed by the DEMETER spacecraft

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F17%3A00477409" target="_blank" >RIV/68378289:_____/17:00477409 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/17:10371462

Result on the web

<a href="http://dx.doi.org/10.1002/2017JA024007" target="_blank" >http://dx.doi.org/10.1002/2017JA024007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2017JA024007" target="_blank" >10.1002/2017JA024007</a>

Result language

angličtina

Original language name

Line radiation events induced by very low frequency transmitters observed by the DEMETER spacecraft

Original language description

Electromagnetic wave data measured by the low-altitude Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) spacecraft sometimes exhibit intense emissions at discrete, harmonically spaced frequencies. We present a comprehensive analysis of this type of phenomenon, and we demonstrate that it is caused by very low frequency (VLF) transmitters in Europe. All available data were investigated for a possible presence of the events. Altogether, 87 events were identified, occurring exclusively during the nighttime. The occurrence of the events does not show any clear relation to the AE and Dst geomagnetic activity indices. The events are clearly localized, occurring either close to Great Britain or in the vicinity of its geomagnetically conjugated region. The frequency spectra of the events typically consist of up to four spectral peaks at multiples of about 1.3kHz. Additional weaker spectral peaks at frequencies of about 1.9kHz and 3.2kHz are occasionally present. The events observed in the Northern Hemisphere tend to have larger-frequency bandwidths than the events observed in the Southern Hemisphere. The occurrence of these events is correlated with the simultaneous detection of signals from VLF transmitters. A bicoherence analysis is employed to demonstrate that wave-wave coupling takes place. Finally, it is shown that the occurrence of the events is associated with a significantly increased precipitation of energetic electrons in a wide range of energies.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Volume of the periodical

122

Issue of the periodical within the volume

7

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

7226-7239

UT code for WoS article

000407627100022

EID of the result in the Scopus database

2-s2.0-85023200081